540505565 has 8 divisors (see below), whose sum is σ = 686760120. Its totient is φ = 406968832.

The previous prime is 540505561. The next prime is 540505579. The reversal of 540505565 is 565505045.

It can be written as a sum of positive squares in 4 ways, for example, as 217297081 + 323208484 = 14741^2 + 17978^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 540505565 - 2² = 540505561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540505561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3179360 + ... + 3179529.

It is an arithmetic number, because the mean of its divisors is an integer number (85845015).

Almost surely, 2^540505565 is an apocalyptic number.

It is an amenable number.

540505565 is a deficient number, since it is larger than the sum of its proper divisors (146254555).

540505565 is a wasteful number, since it uses less digits than its factorization.

540505565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6358911.

The product of its (nonzero) digits is 75000, while the sum is 35.

The square root of 540505565 is about 23248.7755591558. The cubic root of 540505565 is about 814.5793380335.

The spelling of 540505565 in words is "five hundred forty million, five hundred five thousand, five hundred sixty-five".